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    The moons of Jupiter for Time or Position?
    From: Steve E. Bryant
    Date: 2016 May 5, 12:01 -0700

    Dear NavListers,

    Is there now and/or has there ever been a practical use (as a hobbyist or seagoer) for observing the moons of any planet as a means in the determination of one's position on earth; and, if so, how were/are those moons observable much less identifiable given typical optical means available to the sailor? Were the moons useful in determining time only and then, with that information, using other astronomical conditions to establish one's position?

    Steve Bryant

    OKC, OK

       
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